Hereby the my integration of the HACS Power Wheel and the calculation of the energy (kWh) from the measured solar power.
My first issue was that I only measure the power (kW) of my solar panel I found the following python script.
Energy Python Script (kW to kWh)
I adjusted the number of decimal in the script. Because it is using input_number variable instead of sensor I had to add a automisation to copy the sensor value to the input_number
- id: 'tranfer data solar'
alias: move solar data
trigger:
- platform: state
entity_id: sensor.solar_pv_power
action:
service: input_number.set_value
data_template:
entity_id: input_number.solar_power
value: "{{ states('sensor.solar_pv_power')|float }}"
- alias: Energy Integration Solar
initial_state: True
trigger:
- platform: state
entity_id: input_number.solar_power
action:
service: script.turn_on
entity_id: script.solarenergy
This resulted in the following pictures 
